Function space_map_nblocks

freebsd/contrib/openzfs/module/zfs/space_map.c:1099–1105

}

uint64_t
space_map_nblocks(space_map_t *sm)
{
	if (sm == NULL)
		return (0);
	return (DIV_ROUND_UP(space_map_length(sm), sm->sm_blksz));
}